Hi @richlodge5  Here is the BAAAM Date formula: =((A2/1000)/86400)+(DATEVALUE("1-1-1970")-DATEVALUE("1-1-1900"))Make sure you replace the 'A2' to reference the the date cell you are trying to change. Also make sure that the raw (reference) date column (in this example 'A2') is formatted as general. ...